NavShExt.dll

What is it?Norton AV - navshext.dll

What does it do?
This file is a part of Norton AV. There is a common error while trying to
uninstall Norton where this file fails to be removed. Their support page on this
matter can be found
here. You'll see a message that says: "Cannot delete navshext.dll. The
specified file is being used by Windows." This happens even if the computer
has been restarted in a clean boot or in Safe mode. The best fix is to
unregister this .dll file and then delete the folder.

Virus Precautions:You'll want to keep an eye on
this
google search for any known viruses. The normal location of this file is
C:Program FilesNorton AntiVirusNavShExt.dll